CN201812036U - Dual-beam four-antenna microwave radar transceiver for transportation information detection - Google Patents
Dual-beam four-antenna microwave radar transceiver for transportation information detection Download PDFInfo
- Publication number
- CN201812036U CN201812036U CN2010205054058U CN201020505405U CN201812036U CN 201812036 U CN201812036 U CN 201812036U CN 2010205054058 U CN2010205054058 U CN 2010205054058U CN 201020505405 U CN201020505405 U CN 201020505405U CN 201812036 U CN201812036 U CN 201812036U
- Authority
- CN
- China
- Prior art keywords
- antenna
- frequency
- microwave
- sending
- receiving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model discloses a dual-beam microwave radar transceiver for transportation information detection, which adopts two transceiving passages in the same frequency. A microwave signal source generated by a voltage-controlled oscillator is divided into two channels of microwave signals in the same frequency, and then evenly divided into two channels of signals via a power divider, the two channels of signals are respectively sent to a frequency doubler and a frequency mixer, and the frequency doubler and the frequency mixer are respectively connected with a transceiving antenna interface unit. The dual-beam microwave radar transceiver has the advantages that frequency of the microwave signal source is the half of that of a radar, thereby lowering the requirement on performance of a radio frequency switch, reducing transmission loss of the microwave signals on a printed circuit board and being low in cost. Two channels of microwaves are generated through switching of the radio frequency switch, so that mutual interference is avoided. As a dual-antenna reception and transmission separated scheme is adopted, isolation and the signal to noise ratio are improved greatly.
Description
Technical field
The utility model relates to a kind of miniature microwave radar field, particularly a kind of double-beam four-antenna microwave radar transmit-receive device that is used for the transport information detection.
Background technology
In the intelligent transportation system field, commonly the single beam microwave traffic information is gathered radar at present, and radar is only launched single microwave beam, there are many problems in the single beam microwave radar, exist between the vehicle and block and disturb, can't measure the real-time speed of a motor vehicle, can't accurately detect vehicle length etc.If single radar emission 2 bundles have the wave beam of certain angle, the problems referred to above just can be overcome substantially, but the R-T unit that was suitable for the single beam microwave radar originally just can't adopt, and the present invention proposes a kind of double-beam four-antenna microwave radar transmit-receive device that is suitable for the dualbeam microwave radar for this reason.
The utility model content
The utility model provides a kind of double-beam four-antenna microwave radar transmit-receive device that transport information detects that is used in order to solve above technical matters, and technical scheme is as follows:
This device adopts the sending and receiving passage of two road same frequencys, and the sending and receiving antenna is set respectively, produces dualbeam by No. 2 two-beam antenna group emitting antennas, and four tunnel intermediate-freuqncy signals are exported in mixing.
The sending and receiving passage of described two road same frequencys, it is the microwave signal source that produces by voltage controlled oscillator, tell the microwave signal of two road same frequencys through radio-frequency (RF) switch, all tell two road signals through power splitter again and give frequency multiplier and frequency mixer respectively, No. two frequency multipliers are connected with sending and receiving antennal interface unit respectively with frequency mixer.Adopt the mutually orthogonal two-way intermediate-freuqncy signal of image-reject mixer output, output after low noise amplifier amplifies.
Described sending and receiving antennal interface unit, be to hole on metal backing, insert coaxial punching needle assemblies in the hole, the punching needle assemblies has four pins corresponding respectively at two faces of metal backing, four pins in the liner plate outside are connected with the sending and receiving antenna, and four pins of liner plate inboard are connected with receiver and transmitter.
Described two-beam antenna group is to adopt two groups of planar array antennas to constitute, and every group comprises 2 slave antennas, the lobe off-normal left-hand of one group of planar array antenna wherein, another group planar array antenna lobe off-normal dextrad.
Described planar array microwave antenna, after this antenna is connected by one group of 12 planar antenna element, 12 planar antenna element of connecting with another group are in parallel to be constituted, the planar array antenna of two groups of series and parallels adopts end feedback mode to give the aerial array feed, and each planar antenna element adopts the notch-cut type feed.
The planar array antenna of two groups of parallel connections adopts constant power to distribute; The antenna element of every group of series connection adopts unequal power to distribute.
Superior effect of the present utility model is:
1) microwave signal frequency of voltage controlled oscillator VCO generation is half of actual radar frequency of utilization, reduced performance requirement so on the one hand for radio-frequency (RF) switch, also reduced the loss of microwave signal on circuit board on the other hand, and cost has also obtained reduction;
2) the two-way microwave switches generation by radio-frequency (RF) switch, does not therefore have interference each other;
3) scheme that the double antenna transmitting-receiving separates is adopted in the transmitting-receiving of single channel microwave, and isolation and noise specific energy are greatly improved;
4) intermediate-freuqncy signal after the mixing is amplified back output in advance through low noise, helps improving signal to noise ratio (S/N ratio), is convenient to follow-up intermediate-freuqncy signal and handles.
Description of drawings
Fig. 1 is a functional-block diagram of the present utility model;
Fig. 2 is the functional-block diagram of the utility model two tunnel sending and receiving passages;
Fig. 3 is the structural drawing of antennal interface of the present utility model unit;
Fig. 4 is the utility model radio frequency unit power splitter microstrip structure synoptic diagram;
Fig. 5 is the utility model planar array antenna structure figure.
1-modulation signal; 2-radio frequency unit;
3-sending and receiving antennal interface unit;
31-metal backing; 32-punching needle assemblies;
4-intermediate frequency low noise processor;
5-sending and receiving antenna sets;
51-antenna element; 52-end feed.
Embodiment
See also shown in the accompanying drawing, the utility model will be further described.
As depicted in figs. 1 and 2, the utility model provides a kind of double-beam four-antenna microwave radar transmit-receive device that transport information detects that is used for, this device adopts the sending and receiving passage of two road same frequencys, the sending and receiving antenna is set respectively, produce dualbeam by No. 2 two-beam antenna group emitting antennas, four tunnel intermediate-freuqncy signals are exported in mixing.
As shown in Figure 2, the sending and receiving passage of described two road same frequencys, it is the microwave signal source that produces by voltage controlled oscillator 21, tell the microwave signal of two road same frequencys through radio-frequency (RF) switch 22, all telling two road signals through power splitter 23 again is connected for respectively frequency multiplier 24 and frequency mixer 25, No. two frequency multipliers 24 respectively with sending and receiving antennal interface unit 3 with frequency mixer 25.Adopt image-reject mixer to carry out mixing, the mutually orthogonal two-way intermediate-freuqncy signal of each frequency mixer output, output after intermediate frequency low noise processor 4 amplifies.
As shown in Figure 3, described sending and receiving antennal interface unit 3, be boring on metal backing 31, insert coaxial punching needle assemblies 32 in the hole, punching needle assemblies 32 has four pins corresponding respectively at two faces of metal backing 31, four pins 341,342,343,344 in the liner plate outside are connected with the sending and receiving antenna, and four pins of liner plate inboard 331,332,333,334 are connected with receiver and transmitter.
Described two-beam antenna group is to adopt two groups of planar array antennas to constitute, and every group comprises 2 slave antennas, the lobe off-normal left-hand of one group of planar array antenna wherein, another group planar array antenna lobe off-normal dextrad.
Following structure embodiment is further described the utility model.
As shown in Figure 1, the utility model R-T unit is made up of radio frequency unit 2, dual-mode antenna interface unit 3 and intermediate frequency low noise processor 4.Microwave radar with centre frequency 24GHz is that specific embodiment is elaborated as follows.
Radio frequency unit 2 as shown in Figure 2, by voltage controlled oscillator (VCO) 21 generation centre frequency 12GHz, tuning bandwidth is the microwave of 100～300MHz, through becoming 2 tunnel microwave signal sources independently after the radio-frequency (RF) switch 22, the same to the two way microwave signals processing mode, only set forth wherein one the tunnel here.The microwave signal of coming out from radio-frequency (RF) switch 22 becomes two the tunnel after dividing through power division 23 couplings or merit, wherein one tunnel microwave signal becomes the microwave of centre frequency at 24GHz through behind the frequency multiplier 24, by the probe port 331 in the little band of ground connection co-planar waveguide (CPWG) the feed-in dual-mode antenna interface unit 3 shown in Figure 3, outwards launch by the emitting antenna that is connected to probe port 341 then; Another road signal is as the local oscillator LO signal that drives image-reject mixer 25; The microwave of the transmission antennas transmit by being connected in probe port 341 runs into the barrier back reflection, microwave reflection receives back feed-in sound end mouth 342 by receiving antenna, enter frequency mixer 25 as the radio frequency input signal, in frequency mixer 25, the echoed signal and the mixing that transmits are to obtain to carry 2 road mutually orthogonal medium-frequency IF signal I1/Q1 of road Real-time Traffic Information; Another road microwave signal too, the radar transmit-receive device will produce 4 road IF signals output I1, Q1, I2, Q2 like this;
Dual-mode antenna interface unit 3 is by boring on metal backing 31, in the hole, insert coaxial punching needle assemblies 32, have 4 pins on the liner plate 31, wherein Yi Mian 4 pins 331～334 are used for connecting the components and parts of R-T unit, and 4 pins 341～344 of another side are used to connect dual-mode antenna.
As two road antennal interface unit 3 among Fig. 2, be with an interface unit in real work, there are four tunnel wiring to be connected with sending and receiving unit with the fourth officer antenna respectively respectively because the metal backing of an interface unit 31 is upper and lower.
The concrete structure of power splitter 23 as shown in Figure 4, this is a kind of Wilkson power splitter, adopts little band (CPWG) structure.The incident microwave signal enters from port 231, and the outgoing microwave signal has become 2 tunnel of power equalization, comes out from port 232,233 respectively.Metal level 235 is a signal transmission passage, and metal level 234 for ground plane so that the return flow line to be provided.
For improving signal to noise ratio (S/N ratio), 4 road IF signals earlier through low noise amplification processor 4, utilize low noise amplifier to amplify from radio frequency unit 2 output backs, at last from this microwave transceiver device port output.
As shown in Figure 5, described planar array microwave antenna, after this antenna is connected by one group of 12 planar antenna element 51,12 planar antenna element of connecting with another group are in parallel to be constituted, the planar array antenna of two groups of series and parallels adopts end feedback 52 modes to give the aerial array feed, and each planar antenna element adopts the notch-cut type feed.
The planar array antenna of two groups of parallel connections adopts constant power to distribute; The antenna element of every group of series connection adopts unequal power to distribute.
Claims (4)
1. one kind is used for the double-beam four-antenna microwave radar transmit-receive device that transport information detects, it is characterized in that: this device adopts the sending and receiving passage of two road same frequencys, the sending and receiving antenna is set respectively, produces dualbeam by No. 2 two-beam antenna group emitting antennas, four tunnel intermediate-freuqncy signals are exported in mixing.
2. by the described double-beam four-antenna microwave radar transmit-receive device that is used for the transport information detection of claim 1, it is characterized in that: the sending and receiving passage of described two road same frequencys, it is the microwave signal source that produces by voltage controlled oscillator, tell the microwave signal of two road same frequencys through radio-frequency (RF) switch, all tell two road signals through power splitter again and give frequency multiplier and frequency mixer respectively, No. two frequency multipliers are connected with sending and receiving antennal interface unit respectively with frequency mixer.
3. by the described double-beam four-antenna microwave radar transmit-receive device that is used for the transport information detection of claim 2, it is characterized in that: described sending and receiving antennal interface unit, be on metal backing, to hole, insert coaxial punching needle assemblies in the hole, the punching needle assemblies has four pins corresponding respectively at two faces of metal backing, four pins in the liner plate outside are connected with the sending and receiving antenna, and four pins of liner plate inboard are connected with the sending and receiving assembly.
4. by the described double-beam four-antenna microwave radar transmit-receive device that is used for the transport information detection of claim 1, it is characterized in that: described two-beam antenna group, be to adopt two groups of planar array antennas to constitute, every group comprises 2 slave antennas, the lobe off-normal left-hand of one group of planar array antenna wherein, another group planar array antenna lobe off-normal dextrad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205054058U CN201812036U (en) | 2010-08-26 | 2010-08-26 | Dual-beam four-antenna microwave radar transceiver for transportation information detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205054058U CN201812036U (en) | 2010-08-26 | 2010-08-26 | Dual-beam four-antenna microwave radar transceiver for transportation information detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201812036U true CN201812036U (en) | 2011-04-27 |
Family
ID=43894977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205054058U Expired - Lifetime CN201812036U (en) | 2010-08-26 | 2010-08-26 | Dual-beam four-antenna microwave radar transceiver for transportation information detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201812036U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065345A (en) * | 2014-04-24 | 2014-09-24 | 东南大学 | Compact power synthesis balanced frequency tripler |
| CN108427114A (en) * | 2018-01-24 | 2018-08-21 | 吉林大学 | A kind of the frequency division multiplexing millimeter wave three-dimensional image forming apparatus and method of loss balancing |
-
2010
- 2010-08-26 CN CN2010205054058U patent/CN201812036U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065345A (en) * | 2014-04-24 | 2014-09-24 | 东南大学 | Compact power synthesis balanced frequency tripler |
| CN104065345B (en) * | 2014-04-24 | 2017-07-18 | 东南大学 | A kind of compact type power synthesizes balanced type frequency tripler |
| CN108427114A (en) * | 2018-01-24 | 2018-08-21 | 吉林大学 | A kind of the frequency division multiplexing millimeter wave three-dimensional image forming apparatus and method of loss balancing |
| CN108427114B (en) * | 2018-01-24 | 2023-06-02 | 吉林大学 | Loss-compensated frequency division multiplexing millimeter wave three-dimensional imaging device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102998670B (en) | Ka-frequency-band fixed-orientation dual-polarization all-solid-state millimeter-wave cloud radar | |
| CN102680963B (en) | Radar apparatus supporting short and long range radar operation | |
| CN102955155B (en) | Distributed active phased array radar and beam forming method thereof | |
| CN102393512B (en) | Single-antenna frequency-modulated continuous-wave radar radio frequency passive cancellation method | |
| CN201600448U (en) | MWW (millimeter wave) coherent seeker front end device | |
| CN204031163U (en) | High-power millimeter wave transceiving assembly | |
| CN111308462B (en) | Millimeter wave detection and communication integrated phased array system | |
| US8941536B2 (en) | Short-range homodyne radar system | |
| KR20120065652A (en) | Homodyne rf transceiver for radar sensor | |
| CN101587188A (en) | Monopulse radar system based on time modulation antenna array | |
| US8982931B2 (en) | RF puck | |
| US9306647B2 (en) | Tracking system with orthogonal polarizations and a retro-directive array | |
| CN105139047A (en) | Polarized RFID system without chips | |
| CN203287518U (en) | Frequency-modulated continuous wave transmitting and receiving module | |
| CN114779175A (en) | Dual-band full-polarization integrated microwave radar system | |
| CN110988809B (en) | Phased array front end based on nonlinear active antenna | |
| CN203300803U (en) | Beidou/GPS dual-mode hand-held machine multi-frequency point high gain transceiver antenna | |
| CN211856883U (en) | Radar receiver channel calibration device | |
| CN201812036U (en) | Dual-beam four-antenna microwave radar transceiver for transportation information detection | |
| CN109361061B (en) | Antenna with a shield | |
| KR101212219B1 (en) | Tapered slot antenna apparatus and radar having the same | |
| CN101571590B (en) | Low-speed microwave detection system | |
| CN107508040B (en) | Polarization rotation direction backtracking array | |
| CN109768394A (en) | The method of microstrip antenna structure and electromagnetic radiation signal | |
| Cryan et al. | An integrated active circulator antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |
|
| CX01 | Expiry of patent term |